If you've gone snorkeling, diving or whale-watching, the photos and videos you post online are becoming an important part of scientific research on some marine species. That's especially true in the case of the whale shark, the world's biggest fish.

Pope Francis brought a "Mercy and Compassion" theme to the Philippines during his five-day visit. But despite the huge crowds that flocked to see the pontiff and celebrate Mass, activists say real issues of social justice were hidden from Francis by the government.